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United States Patent | 6,233,164 |
Zee ,   et al. | May 15, 2001 |
The protection circuit comprises a storage capacitor which is coupled with a terminal of a secondary winding which charges said storage capacitor during the on-interval of the switching transistor. During the off-interval of the switching transistor the charge of the storage capacitor is fed to the driver stage or the control capacitor for closing or keeping closed the switching transistor when one of the secondary windings has a short circuit.
Inventors: | Zee; Kum Yoong (Johor, MK); Koh; Kian Meng (Singapore, SG); Ng; Seng Huat (Singapore, SG) |
Assignee: | Thomson Multimedia S.A. (Boulogne Cedex, FR) |
Appl. No.: | 431507 |
Filed: | November 1, 1999 |
Nov 11, 1998[DE] | 98121390 |
Current U.S. Class: | 363/56.03; 363/19; 363/132 |
Intern'l Class: | H02M 007/122; H02M 003/335 |
Field of Search: | 363/56,49,60,19,21,142,17,97,98,132 |
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5867373 | Feb., 1999 | Lohrer et al. | 363/19. |
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